Publication detail

Investigation of the Airflow inside Realistic and Semi-Realistic Replicas of Human Airways

LÍZAL, F. JEDELSKÝ, J. BĚLKA, M. ZAREMBA, M. MALÝ, M. JÍCHA, M.

Original Title

Investigation of the Airflow inside Realistic and Semi-Realistic Replicas of Human Airways

English Title

Investigation of the Airflow inside Realistic and Semi-Realistic Replicas of Human Airways

Type

conference paper

Language

en

Original Abstract

Measurement of velocity in human lungs during breathing cycle is a challenging task for researchers, since the measuring location is accessible only with significant difficulties. A special measuring rig consisting of optically transparent replica of human lungs, breathing simulator, particle generator and Laser-Doppler anemometer was developed and used for investigation of the velocity in specific locations of lungs during simulated breathing cycle.Experiments were performed on two different replicas of human lungs in corresponding measuring points tofacilitate the analysis of the influence of the geometry and its simplification on the flow. The analysis of velocity course and turbulence intensity revealed that special attention should be devoted to the modelling of vocal cords position during breathing, as the position of laryngeal jet created by vocal cords significantly influences velocity profiles in trachea. The shapes of velocity courses during expiration proved to be consistent for both replicas; however magnitudes of peak expiratory velocity differ between the corresponding measuring points in both the replicas.

English abstract

Measurement of velocity in human lungs during breathing cycle is a challenging task for researchers, since the measuring location is accessible only with significant difficulties. A special measuring rig consisting of optically transparent replica of human lungs, breathing simulator, particle generator and Laser-Doppler anemometer was developed and used for investigation of the velocity in specific locations of lungs during simulated breathing cycle.Experiments were performed on two different replicas of human lungs in corresponding measuring points tofacilitate the analysis of the influence of the geometry and its simplification on the flow. The analysis of velocity course and turbulence intensity revealed that special attention should be devoted to the modelling of vocal cords position during breathing, as the position of laryngeal jet created by vocal cords significantly influences velocity profiles in trachea. The shapes of velocity courses during expiration proved to be consistent for both replicas; however magnitudes of peak expiratory velocity differ between the corresponding measuring points in both the replicas.

Keywords

laser-doppler anemometry, lung replica, lung flow

RIV year

2015

Released

06.05.2015

Publisher

EDP Sciences

Location

Francie

Pages from

1

Pages to

8

Pages count

8

URL

Full text in the Digital Library

BibTex


@inproceedings{BUT111792,
  author="František {Lízal} and Jan {Jedelský} and Miloslav {Bělka} and Matouš {Zaremba} and Milan {Malý} and Miroslav {Jícha}",
  title="Investigation of the Airflow inside Realistic and Semi-Realistic Replicas of Human Airways",
  annote="Measurement of velocity in human lungs during breathing cycle is a challenging task for 
researchers, since the measuring location is accessible only with significant difficulties. A special measuring 
rig consisting of optically transparent replica of human lungs, breathing simulator, particle generator and 
Laser-Doppler anemometer was developed and used for investigation of the velocity in specific locations of 
lungs during simulated breathing cycle.Experiments were performed on two different replicas of human lungs 
in corresponding measuring points tofacilitate the analysis of the influence of the geometry and its 
simplification on the flow. The analysis of velocity course and turbulence intensity revealed that special 
attention should be devoted to the modelling of vocal cords position during breathing, as the position of 
laryngeal jet created by vocal cords significantly influences velocity profiles in trachea. The shapes of velocity 
courses during expiration proved to be consistent for both replicas; however magnitudes of peak expiratory 
velocity differ between the corresponding measuring points in both the replicas.",
  address="EDP Sciences",
  booktitle="EPJ Web of Conferences",
  chapter="111792",
  doi="10.1051/epjconf/20159202048",
  howpublished="online",
  institution="EDP Sciences",
  number="2015",
  year="2015",
  month="may",
  pages="1--8",
  publisher="EDP Sciences",
  type="conference paper"
}